APOE and myocardial infarction: A significant difference was observed for the variant genotype ɛ3/ɛ4 [OR (95% CI) = 2.13 (1.32–2.65): p = 0.031)] and ɛ4 allele [OR (95% CI) = 2.11 (1.25–2.43): p = 0.03)] of APOE in MI patients compared to control; Whereas other genotypes (ɛ2/ɛ2, ɛ2/ɛ3, ɛ2/ɛ4, ɛ2/ɛ2, and ɛ3/ɛ3) and allele (ɛ2) showed no statistically significant difference (all p > 0.05).